Efficient heat recovery heat pump drying machine

Abstract

The utility model relates to an efficient heat recovery heat pump drying machine. According to a common heat pump drying system, when a drying room is dehumidified, heat is discharged together, and heat loss is large. The device comprises a compressor, a condenser, an evaporator and an expansion valve, an outlet of the compressor is connected with an inlet of the condenser, an outlet of the condenser is connected with a liquid accumulator, the liquid accumulator is connected with the evaporator through a pipeline, the expansion valve is arranged on the pipeline, and an outlet of the evaporator is connected with the compressor; the condenser is arranged on an air inlet channel of the drying room, the evaporator is arranged on a moisture removal air outlet channel of the drying room, the heat recoverer is arranged in the front row of the evaporator and comprises a central heat dissipation metal pipe, heat dissipation fins are evenly arranged outside the central heat dissipation metal pipe, and the heat dissipation fins are arranged in the middle of the central heat dissipation metal pipe. And a refrigerant medium is arranged in the central radiating metal tube. The heat recovery component is additionally arranged, the overall layout of the drying room is not affected, the structure is simple, and the heat recovery effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drying in drying rooms, and particularly relates to an efficient heat recovery heat pump dryer. Background Art

[0002] Generally, heat pump drying is the same as boiler drying, only providing heat source for the drying room. The moisture evaporated from the materials is mixed with the air in the drying room. When the drying room discharges moisture, the heat is discharged together, resulting in a large heat loss.

[0003] Application No. 202121769581.7 discloses a moisture discharge device for a drying room. A moisture discharge evaporator is installed at the lower moisture discharge port of the drying room. The air outlet of the moisture discharge evaporator is communicated with the upper return air duct through the lower return air duct. A condenser is installed at the outlet of the upper return air duct. The air outlet of the condenser is communicated with the hot air duct. There is an air inlet of the hot air duct communicated with the outside of the drying room. The inlet of the condenser is connected to the outlet of the compressor through a pipeline. The inlet of the compressor is connected to the outlet of the moisture discharge evaporator through a pipeline. The inlet of the moisture discharge evaporator is connected to the outlet of the throttling device through a pipeline and a series-connected moisture discharge solenoid valve. The inlet of the throttling device is connected to the outlet of the condenser through a pipeline. The inlet of the compressor is also connected to the outlet of the main evaporator through a pipeline. The inlet of the main evaporator is connected to the outlet of the throttling device through a pipeline and a series-connected main solenoid valve at the same time.

[0004] In the above device, heat recovery mainly relies on setting up a return air duct, and the heat is recovered through the design layout of the air duct. The structure is relatively complex, and there is no special heat recovery component, so the recovery efficiency is not high. Content of the Utility Model

[0005] In view of the above problems, the utility model provides an efficient heat recovery heat pump dryer, which adds a heat recovery component, does not affect the overall layout of the drying room, has a simple structure, and improves the heat recovery effect.

[0006] Therefore, the utility model adopts the following technical solution: An efficient heat recovery heat pump dryer includes a compressor, a condenser, an evaporator and an expansion valve. It is characterized in that the outlet of the compressor is connected to the inlet of the condenser, the outlet of the condenser is connected to a liquid receiver, the liquid receiver is connected to the evaporator through a pipeline, and an expansion valve is arranged on the pipeline. The outlet of the evaporator is connected to the compressor. The condenser is arranged on the air inlet channel of the drying room, and the evaporator is arranged on the moisture discharge air outlet channel of the drying room. It further includes a heat recovery device, and the heat recovery device is arranged in front of the evaporator. The heat recovery device includes a central heat dissipation metal pipe, heat dissipation fins are uniformly arranged outside the central heat dissipation metal pipe, and a refrigerant medium is arranged in the central heat dissipation metal pipe.

[0007] Preferably, the heat recovery device penetrates through the air inlet channel and the moisture discharge air outlet channel, and the heat recovery device is arranged in front of the evaporator and the condenser.

[0008] Preferably, the drying chamber is separated into an air inlet passage and an air outlet passage by a partition in the center, and a drying area is formed inside the drying chamber.

[0009] Preferably, the heat recovery device is of an integral structure and is longitudinally arranged on the air inlet passage and the moisture exhaust air outlet passage of the drying chamber. The air inlet passage and the moisture exhaust air outlet passage are separated into upper and lower partitions by a partition.

[0010] Preferably, an air outlet fan is arranged at the rear row of the evaporator, and an air inlet fan is arranged at the rear row of the condenser.

[0011] Preferably, the central heat dissipation metal tube is a copper tube.

[0012] The heat recovery device added to the present utility model is an independent system, which is composed of a central heat dissipation metal tube and fins. It also transfers heat from a high-temperature place to a low-temperature place through the conversion of a medium liquid and gas. The exhaust air side is the high-temperature place, and the air inlet side of the drying chamber is the low-temperature place, so as to achieve the purpose of heat recovery. After the system absorbs heat, the temperature of the exhausted humid air is almost the same as the temperature of the outdoor fresh air, and all the heat is locked in the drying chamber. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0014] Figure 2 It is a schematic diagram of the heat recovery device of the present utility model.

[0015] In the figure: 1 - compressor; 2 - condenser; 3 - evaporator; 4 - heat recovery device; 5 - expansion valve; 6 - air inlet fan; 7 - air outlet fan; 8 - liquid storage tank; 9 - partition; 10 - drying area; 11 - air inlet passage; 12 - air outlet passage; 13 - drying chamber; 14 - fins; 15 - metal tube; 16 - liquid medium; 17 - gaseous medium. Detailed Embodiments

[0016] The present utility model will be further described below in conjunction with specific embodiments.

[0017] As Figure 1 - Figure 2An efficient heat recovery heat pump dryer shown in the figure includes a compressor 1, a condenser 2, an evaporator 3 and an expansion valve 5. The outlet of the compressor 1 is connected to the inlet of the condenser 2, the outlet of the condenser 2 is connected to a liquid receiver 8, the liquid receiver is connected to the evaporator 3 through a pipeline, and the expansion valve 5 is arranged on the pipeline. The outlet of the evaporator 3 is connected to the compressor 1. The condenser 2 is arranged on the air inlet passage 11 of the drying room 13, the evaporator 3 is arranged on the moisture exhaust and air outlet passage 12 of the drying room, and a heat recovery device 4 is further included. The heat recovery device 4 is arranged in front of the evaporator 3. The heat recovery device includes a central heat dissipation metal pipe 15, preferably a copper pipe. Heat dissipation fins 14 are evenly arranged outside the copper pipe, and a refrigerant medium is arranged inside the copper pipe.

[0018] When the drying room exhausts moisture, the hot and humid air passes through the heat recovery device 4 and the evaporator 3. After the two systems absorb heat, the temperature of the exhausted humid air is nearly the same as the outdoor fresh air temperature, and all the heat is locked in the drying room.

[0019] Specifically, the heat recovery device penetrates through the air inlet passage 11 and the moisture exhaust and air outlet passage 12, and the heat recovery device is arranged in front of the evaporator 3 and the condenser 2. The heat recovery device is an independent system, and it transfers heat from a high-temperature area to a low-temperature area through the conversion of a medium liquid 16 and a gaseous medium 17. The exhaust air side is the high-temperature area, and the air inlet side of the drying room is the low-temperature area, so as to achieve the purpose of heat recovery.

[0020] Specifically, the drying room 13 is divided into an air inlet passage 11 and an air outlet passage 12 by a partition 9 in the center, and a drying area 10 is formed inside the drying room 13. The whole drying room is a horizontally arranged ventilation loop, with air inlet and air outlet formed at the upper and lower ends, and a high-temperature drying area inside.

[0021] Specifically, the heat recovery device 4 is integrally longitudinally arranged on the air inlet passage and the moisture exhaust and air outlet passage of the drying room. The heat recovery device recovers heat in the high-temperature and low-temperature areas.

[0022] In order to efficiently guide the inlet air and the outlet air, an air outlet fan 7 is arranged at the rear row of the evaporator, and an air inlet fan 6 is arranged at the rear row of the condenser.

[0023] The working process of the present utility model is as follows: the compressor compresses the medium air → the condenser condenses the medium from a gas into a liquid (releasing heat) → the expansion valve reduces the pressure of the high-pressure medium liquid → the evaporator evaporates the medium liquid from a liquid into a gas and absorbs heat.

[0024] The hot air exhausted from the moisture exhaust and air outlet passage is absorbed by the heat recovery device and the evaporator. After that, the temperature of the exhausted humid air is nearly the same as the outdoor fresh air temperature, and all the heat is locked in the drying room. The heat recovery device transfers heat from a high-temperature area to a low-temperature area through the conversion of a medium liquid and a gas. The exhaust air side is the high-temperature area, and the air inlet side of the drying room is the low-temperature area, achieving the purpose of heat recovery.

[0025] It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A high-efficiency heat recovery heat pump dryer, comprising a compressor (1), a condenser (2), an evaporator (3) and an expansion valve (5), characterized in that The outlet of the compressor (1) is connected to the inlet of the condenser (2), the outlet of the condenser (2) is connected to the liquid storage tank (8), the liquid storage tank is connected to the evaporator (3) via a pipeline, an expansion valve (5) is arranged on the pipeline, and the outlet of the evaporator (3) is connected to the compressor (1); the condenser (2) is arranged on the air inlet channel (11) of the drying room (13), the evaporator (3) is arranged on the dehumidification air outlet channel (12) of the drying room, and also includes a heat recovery device (4), the heat recovery device (4) is arranged in the front row of the evaporator (3), the heat recovery device includes a central heat dissipation metal tube (15), heat dissipation fins (14) are evenly arranged on the outside of the central heat dissipation metal tube, and a refrigerant medium is arranged in the central heat dissipation metal tube.

2. A high-efficiency heat recovery heat pump dryer according to claim 1, characterized in that The heat recovery device runs through the air inlet channel (11) and the moisture removal air outlet channel (12), and the heat recovery device is arranged in the front row of the evaporator (3) and the condenser (2).

3. A high-efficiency heat recovery heat pump dryer according to claim 2, characterized in that The drying room (13) is divided into an air inlet channel (11) and an air outlet channel (12) at the center by a partition (9), and a drying area (10) is formed inside the drying room (13).

4. A high-efficiency heat recovery heat pump dryer according to claim 2 or 3, characterized in that The heat recovery device (4) is an integrated structure and is longitudinally arranged on the air inlet channel and the dehumidification air outlet channel of the drying room. The air inlet channel and the dehumidification air outlet channel are divided into two upper and lower partitions by a partition.

5. The high-efficiency heat recovery heat pump dryer according to claim 1 is characterized in that An air outlet fan (7) is arranged at the rear row of the evaporator, and an air inlet fan (6) is arranged at the rear row of the condenser.

6. The high-efficiency heat recovery heat pump dryer according to claim 1, characterized in that The central heat dissipation metal tube (15) is a copper tube.

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